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Maleic Anhydride (MA) grafted propylene-butadiene copolymer (PPB) was prepared. FTIR and 1H-NMR results indicated that the MA molecules reacted with the double bond in the butadiene unit of the PPB and the grafting percentage increased with the butadiene content in the initial copolymer. GPC results showed the introduction of butadiene in the copolymer prevented the degradation of the PPB. The MA-g-PPB (MPPB) was applied in PP/SBS/OMMT composite as compatibilizer. In the presence of 10phr MPPB, the impact strength of the composite was improved by ~20%. XRD patterns indicated the formation of β-phase crystallization of polypropylene in the presence of MPPB and a significant decrease of the spherulite size was observed. TEM images showed that the OMMT was better dispersed in the matrix upon the inclusion of MPPB. Better distribution of the rubber-phase and rugged fracture surface were observed in SEM images as the MPPB proportion was increased.
Cheng, Q., Lu, Z., Byrne, H.: Synthesis of Maleic Anhydride grafted Polypropylene-butadiene copolymer and its application in PP/OMMT/SBS composite as compatibilizer. Journal of Applied Polymer Science, Volume 114, Issue 3, pp.1820-182. 2009.